Two-dimensional photonic crystals in antimony-based films fabricated by holography

Abstract

In this work, we demonstrated the fabrication of two-dimensional (2D) photonic crystals layers (2D-PCLs) by combining holographic recording and the evaporation of antimony-based glasses. Such materials present high refractive indices that can be tuned from 1.8 to 2.4, depending on the film composition; thus, they are interesting dielectric materials for fabrication of 2D-PCLs. The good quality of the obtained samples allowed the measurement of their PC properties through the well-defined Fano resonances that appear in the transmittance spectrum measurements at different incidence angles. The experimental results are in good agreement with the calculated band diagram for the hexagonal asymmetric structure.

Chemically deposited Sb2S3 thin films for optical recording

“…On the basis of evaluation of the optical band gap, laser induced crystallization and amorphization were inferred in the amorphous and crystallized thin films, respectively. Antimony contained glassy materials have shown optically induced crystallization which makes them attractive in optical memories and other photonic devices [22,23]. In amorphous Sb x Se 1−x alloys, transitory changes in the optical properties and crystallization were observed under irradiation by 3 mW He-Ne laser [24].…”